PUSH - PULL OUTPUT TRANSFORMERS
FOR TUBE AMPLIFIERS
CAUTION! HIGH VOLTAGE!
Observe safety precautions when working with high voltage!
In all output transformers sectioning is applied for reaching of as much as possible wide pass-band.
Each transformer passes primary heat treatment in a current of 24 hours in thermocases and vacuum impregnation
by a varnish in primary sort.
For a bandage couplers from not magnetic materials are used.
Standard multi-coloured outputs of transformers (length 15 - 20 cm)
can be used directly in point-to-point application.
Differ in pairs of transformers no more than 5 % on all measured parametres.
We offer PP output transformers potted into black boxes of black colour (powder colouring) or not potted.
Manufacturing of push-pull output transformers under the individual technical specification is possible.
"Golden Middle" reserves the right to make changes in products
not affecting the basic technical characteristics.
All transformers have a limited warranty according technical specifications
during 12 months from the date of receiving.
POT - PP - 6,0 / 8 - 20
Ra-a 6 KOhm / 8 Ohm 20 W
potted into black boxes
TECHNICAL SPECIFICATIONS :
Case dimensions : 75 mm x 85 mm x H 95 mm
The adjusting sizes : 4 õ M4 55 mm õ 65 mm
Maximal primary DC current : 0,15 À
The maximum DC operation voltage : 1000 V
The maximum output power : 20 W
Frequency range of 1 W : 15 Hz - 45 KHz
Ulraline tapes 40% / 60%
It is recommended to use with following vacuum tubes :
EL86,
6P14P / EL84 / 6BQ5,
6P18P,
6P15P,
6P3S / 6L6,
6Ð3Ñ õ 1, GU29,
GI30,
6P6S / 6V6,
6F6S / 6F6, 6P43P
Transformer circuit diagram 
POT - PPU - 8,0 / 8 / 16 - 25
Ra-a 8 KOhm / 8 or 16 Ohm 25 W
potted into black boxes
TECHNICAL SPECIFICATIONS :
Case dimensions : 75 mm x 85 mm x H 95 mm
The adjusting sizes : 4 õ M4 55 mm õ 65 mm
Maximal primary DC current : 0,15 À
The maximum DC operation voltage : 1000 V
The maximum output power : 25 W
Frequency range of 1 W : 15 Hz - 45 KHz
Ulraline tapes 40% / 60%
It is recommended to use with following vacuum tubes :
UL EL86,
EL86,
UL 6P14P / EL84 / 6BQ5,
6P14P / EL84 / 6BQ5,
UL 6P3S / 6L6,
6P3S / 6L6,
UL 6P6S / 6V6,
6P6S / 6V6, UL 6P43P, 6P43P
Transformer circuit diagram
POT - PP - 5,0 / 8 - 40
OT - PP - 5,0 / 8 - 40
Ra-a 5 KOhm / 8 Ohm 40 W
potted into black boxes not potted
TECHNICAL SPECIFICATIONS :
Case dimensions : 130 mm x 100 mm x H 110 mm (for the potted item)
The adjusting sizes : 4 õ M4 70 mm õ 100 mm (for the potted item)
Maximal primary DC current : 0,55 À
The maximum DC operation voltage : 1000 V
The maximum output power : 40 W
Frequency range of 1 W : 10 Hz - 45 KHz
Feedback windings - catode 1/4 : 1/4
It is recommended to use with following vacuum tubes :
6S4S / 2S4S / 2A3,
6L6 / 6P3S,
300B,
6550,
EL34, 6P41S, 6P36S,
6P45S / EL509,
ÊÒ66,
KT88,
G807, GU50, 6R3S
Transformer circuit diagram
POT - PP - 5,0 / 8 - 50
OT - PP - 5,0 / 8 - 50
Ra-a 5 KOhm / 8 Ohm 50 W
potted into black boxes not potted
TECHNICAL SPECIFICATIONS :
EE-core 19,5 cm2
Case dimensions : 96 mm x 96 mm x H 130 mm (for the not potted item)
The adjusting sizes : 4 õ M4 80 mm õ 100 mm (for the not potted item)
Case dimensions : 110 mm x 110 mm x H 145 mm (for the potted item)
The adjusting sizes : 4 õ M4 80 mm õ 80 mm (for the potted item)
Maximal primary DC current : 0,6 A
The maximum DC operation voltage : 1000 V
The maximum output power : 50 W
Frequency range of 1 W : 10 Hz - 40 KHz
Feedback windings - catode 1/2 : 1/2
It is recommended to use with following vacuum tubes :
6S4S / 2S4S / 2A3,
6L6 / 6P3S,
300B,
6550,
EL34, 6P41S, 6P36S,
6P45S / EL509,
ÊÒ66,
KT88,
G807, GU50, 6R3S
Transformer circuit diagram
POT - PPU - 5,0 / 8 - 50
OT - PPU - 5,0 / 8 - 50
Ra-a 5 KOhm / 8 Ohm 50 W
potted into black boxes not potted
TECHNICAL SPECIFICATIONS :
EE-core 19,5 cm2
Case dimensions : 96 mm x 96 mm x H 130 mm (for the not potted item)
The adjusting sizes : 4 õ M4 80 mm õ 100 mm (for the not potted item)
Case dimensions : 110 mm x 110 mm x H 145 mm (for the potted item)
The adjusting sizes : 4 õ M4 80 mm õ 80 mm (for the potted item)
Maximal primary DC current : 0,6 A
The maximum DC operation voltage : 1000 V
The maximum output power : 50 W
Frequency range of 1 W : 10 Hz - 40 KHz
Feedback windings - catode 1/2 : 1/2
It is recommended to use with following vacuum tubes :
6S4S / 2S4S / 2A3,
6L6 / 6P3S,
300B,
6550,
EL34, 6P41S, 6P36S,
6P45S / EL509,
ÊÒ66,
KT88,
G807, GU50, 6R3S
Transformer circuit diagram
POT - PP - 6,0 / 8 - 50
OT - PP - 6,0 / 8 - 50
Ra-a 6 KOhm / 8 Ohm 50 W
potted into black boxes not potted
TECHNICAL SPECIFICATIONS :
Case dimensions : 130 mm x 100 mm x  110 mm (for the potted item)
The adjusting sizes : 4 õ M4 70 mm õ 100 mm (for the potted item)
The adjusting sizes : 4 õ M4 70 mm õ 100 mm (for the not potted item)
Maximal primary DC current : 0,55 À
The maximum DC operation voltage : 1000 V
The maximum output power : 50 W
Frequency range of 1 W : 10 Hz - 45 KHz
Feedback windings - catode 1/4 : 1/4
It is recommended to use with following vacuum tubes :
6S4S / 2S4S / 2A3,
6L6 / 6P3S,
300B,
6550,
EL34, 6P41S, 6P36S,
6P45S / EL509,
ÊÒ66,
KT88,
G807, GU50 , 6R3S, RB300-3CX
Transformer circuit diagram
POT - PP - 6,0 / 8 - 40
Ra-a 6 KOhm / 8 Ohm 40 W
potted into black boxes
TECHNICAL SPECIFICATIONS :
Case dimensions : 130 mm x 100 mm x  110 mm
The adjusting sizes : 4 õ M4 70 mm õ 100 mm
Maximal primary DC current : 0,55 A
The maximum DC operation voltage : 1000 V
The maximum output power : 40 W
Frequency range of 1 W : 10 Hz - 45 KHz
It is recommended to use with following vacuum tubes :
6S4S / 2S4S / 2A3,
6L6 / 6P3S,
300B,
6550,
EL34, 6P41S, 6P36S,
6P45S / EL509,
ÊÒ66,
KT88,
G807, GU50
, 6R3S, RB300-3CX
Transformer circuit diagram
POT - PP - 8,0 / 8 - 20
Ra-a 8 KOhm / 8 Ohm 20 W
potted into black boxes
TECHNICAL SPECIFICATIONS :
Case dimensions : 65 mm x 85 mm x  110 mm
The adjusting sizes : 4 õ M3 45 mm õ 65 mm
Maximal primary DC current : 0,2 A
The maximum DC operation voltage : 1000 V
The maximum output power : 20 W
Frequency range of 1 W : 18 Hz - 30 KHz
Recommended for tubes :
6P14P / EL84 / 6BQ5,
6P6S / 6V6,
6F6S / 6F6 ,
6Ï9,
4P1L, GU17, 6P43P
Transformer circuit diagram
POT - PP - 12,0 / 8 - 100
Ra-a 12 KOhm / 8 Ohm 100 W
potted into black boxes
TECHNICAL SPECIFICATIONS :
Case dimensions : 130 mm x 150 mm õ 110 mm
The adjusting sizes : 4 õ M4 100 mm õ 120 mm
Maximal primary DC current : 0,6 A
The maximum DC operation voltage : 2500 V
The maximum output power : 100 W
Frequency range of 1 W : 15 Hz - 30 KHz
Recommended for tubes :
GM70,
845,
211,
GK71, SV572
Transformer circuit diagram
